There are two major flaws to this otherwise decent game
The look and responsiveness of this game are excellent. Generally, playability is also excellent, but there are two flaws. First, because of the number of tiles and the fact that there are only four of each tile, there are long dry spells of not winning. Second, there is no way to pause the game -- at least, not that I have found. This is an app for iDevices which are multi-use devices. If you stop to respond to a text or eat lunch or look busy, the game in progress is generally lost. If you have to cut away, the game should at least offer the option of pausing, and the timer should pause while the game is delayed. I would add a star for each of those if they were fixed.